/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package org.seasar.framework.container.hotdeploy;
import java.io.InputStream;
import org.seasar.framework.convention.NamingConvention;
import org.seasar.framework.log.Logger;
import org.seasar.framework.util.ClassLoaderUtil;
import org.seasar.framework.util.ClassUtil;
import org.seasar.framework.util.InputStreamUtil;
import org.seasar.framework.util.ResourceUtil;
/**
* HOT deploy用の {@link ClassLoader}です。
*
* @author higa
*/
public class HotdeployClassLoader extends ClassLoader {
private static final Logger logger = Logger
.getLogger(HotdeployClassLoader.class);
private NamingConvention namingConvention;
/**
* {@link HotdeployClassLoader}を作成します。
*
* @param classLoader
* @param namingConvention
*/
public HotdeployClassLoader(ClassLoader classLoader,
NamingConvention namingConvention) {
super(classLoader);
this.namingConvention = namingConvention;
}
public Class loadClass(String className, boolean resolve)
throws ClassNotFoundException {
if (HotdeployUtil.REBUILDER_CLASS_NAME.equals(className)) {
Class clazz = findLoadedClass(className);
if (clazz != null) {
return clazz;
}
return defineClass(className, resolve);
}
if (isTargetClass(className)) {
Class clazz = findLoadedClass(className);
if (clazz != null) {
return clazz;
}
clazz = ClassLoaderUtil.findLoadedClass(getParent(), className);
if (clazz != null) {
logger.log("WSSR0015", new Object[] { className });
return clazz;
}
clazz = defineClass(className, resolve);
if (clazz != null) {
return clazz;
}
}
return super.loadClass(className, resolve);
}
/**
* {@link Class}を定義します。
*
* @param className
* @return {@link Class}
*/
private Class defineClass(String className, boolean resolve) {
Class clazz;
String path = ClassUtil.getResourcePath(className);
InputStream is = ResourceUtil.getResourceAsStreamNoException(path);
if (is != null) {
clazz = defineClass(className, is);
if (resolve) {
resolveClass(clazz);
}
return clazz;
}
return null;
}
/**
* {@link Class}を定義します。
*
* @param className
* @param classFile
* @return {@link Class}
*/
protected Class defineClass(String className, InputStream classFile) {
return defineClass(className, InputStreamUtil.getBytes(classFile));
}
/**
* {@link Class}を定義します。
*
* @param className
* @param bytes
* @return {@link Class}
*/
protected Class defineClass(String className, byte[] bytes) {
return defineClass(className, bytes, 0, bytes.length);
}
/**
* HOT deployの対象のクラスかどうか返します。
*
* @param className
* @return HOT deployの対象のクラスかどうか
*/
protected boolean isTargetClass(String className) {
return namingConvention.isHotdeployTargetClassName(className);
}
}